The Hyperion long sleeve crew “birds eye” pullover provides superior thermo-regulation with extremely generous ventilation. Fast-drying and lightweight, the Hyperion is ideal for early season environments. Designed for mild-to-hot conditions. Added Stealth Scent Control which incorporates antimicrobial technology and moisture-wicking to reduce odors and pull sweat off the skin to help dry faster.100% PolyesterBirds eye mesh Stretch fabric PackableArticulated (athletic) fit